Grand Tack模型：一个批判性的评论
The Grand Tack model: a critical review
摘要：
“Grand Tack”模型提出，内太阳系是由巨型行星在气态原行星盘中的轨道迁移塑造而成的。木星首先向内迁移，然后木星和土星一起向外迁移。如果木星的转向点或“定位点”在约1.5天文单位，那么构成类地行星的内盘将在约1天文单位处被截断，自然产生类地行星的质量和间距。在气体巨星的迁移过程中，小行星带被严重耗尽，但又被不同的星子储层重新填充，这些星子储层可能与现在的S型和C型有关。巨行星的轨道与后来外太阳系的演化相一致。在这里，我们面对的是对Grand Tack模型的普遍批评。我们发现，一些不确定性仍然存在关于Tack机制本身，最关键的未知数是土星和木星上的气体吸积的时间和速度。目前对太阳系天体的同位素和成分的测量--包括土星卫星的D/H比--并没有反驳这个模型。我们讨论了如何交替模型的形成的类地行星，每个遭受内部的不一致性和/或放置一个强大的和非常具体的要求上的属性的原行星盘。我们的结论是，大钉模型仍然是可行的，并与我们目前的理解行星形成。尽管如此，我们鼓励对Grand Tack进行更多的测试，并建造替代模型。
英文摘要：
The `Grand Tack' model proposes that the inner Solar System was sculpted by the giant planets' orbital migration in the gaseous protoplanetary disk. Jupiter first migrated inward then Jupiter and Saturn migrated back outward together. If Jupiter's turnaround or "tack" point was at ~1.5 AU the inner disk of terrestrial building blocks would have been truncated at ~1 AU, naturally producing the terrestrial planets' masses and spacing. During the gas giants' migration the asteroid belt is severely depleted but repopulated by distinct planetesimal reservoirs that can be associated with the present-day S and C types. The giant planets' orbits are consistent with the later evolution of the outer Solar System. Here we confront common criticisms of the Grand Tack model. We show that some uncertainties remain regarding the Tack mechanism itself; the most critical unknown is the timing and rate of gas accretion onto Saturn and Jupiter. Current isotopic and compositional measurements of Solar System bodies -- including the D/H ratios of Saturn's satellites -- do not refute the model. We discuss how alternate models for the formation of the terrestrial planets each suffer from an internal inconsistency and/or place a strong and very specific requirement on the properties of the protoplanetary disk. We conclude that the Grand Tack model remains viable and consistent with our current understanding of planet formation. Nonetheless, we encourage additional tests of the Grand Tack as well as the construction of alternate models.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
